"No space left on device" error for TCP read?

Sebastian Damm via sr-users <[email protected]> Tue, 10 Mar 2026 15:45:31 +0000

Newsgroups	gmane.comp.voip.ser
Message-ID	<FR2P281MB0169686D49650789EDFC64C2F746A@FR2P281MB0169.DEUP281.PROD.OUTLOOK.COM>

Hi,

We are running some Kamailio proxies with a lot of TLS clients. And they log a lot of TCP "noise" during the day, like those messages:

      
ERROR: <core> [core/tcp_read.c:267]: tcp_read_data(): error reading: Connection timed out (110) ([]:29265 -> []:5061)
ERROR: <core> [core/tcp_read.c:267]: tcp_read_data(): error reading: Connection reset by peer (104) ([]:12013 -> []:5061)

That's when connections close, apparently. (BTW, those are original messages, I did not remove IP addresses.)

But sometimes I see this line:

ERROR: <core> [core/tcp_read.c:267]: tcp_read_data(): error reading: No space left on device (28) ([]:62892 -> []:5061)


To me, this does not make sense. Can somebody explain what this means? Do I have to tweak something somewhere?


Thanks, Regards,
Sebastian

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